The exceptional brilliance of 1960s architecture comes partly from technical improvements. In its versatility and strength, reinforced concrete was vastly superior to any earlier building technology, freeing architects to make the shapes they judged most useful and beautiful

From a floating cinema to a car park-cum-art gallery, some of Britain’s most innovative (and people-friendly) design is seen in temporary projects in public spaces. Here’s what’s been popping up in London and beyond this summer